What term is used to describe flat, brownish spots on the skin, often caused by sun exposure and sometimes referred to as liver spots?

The term "lentigo" specifically refers to flat, brownish spots on the skin that often appear as a result of sun exposure. These spots are commonly associated with aging and are frequently called liver spots or age spots. Lentigines can develop on areas of the skin that have been exposed to sunlight over time and represent localized areas of increased pigmentation. This characteristic makes lentigo distinct in contrast to other skin conditions. For instance, dermatosis papulosa nigra is related to small, raised dark lesions primarily found on darker skin types, while melasma involves larger patches of brown discoloration often triggered by hormonal changes, commonly seen in pregnant women or those using hormonal contraceptives. Port wine stains, on the other hand, are vascular malformations that present as deep red or purple marks and are usually present at birth.